-83.79% is the change from 981 to 159
Calculation steps:
[( 159 - 981 ) ÷ 981] x 100 = -83.79%
Formula
Percentage change = [(159 - 981) / 981] x 100
Subtract the new number by the original number
159 - 981 = -822
-822 ÷ 981 = -0.8379204892966361
-0.8379204892966361 x 100 = -83.79%